XLII.--Alarmed at this calamity, the townsmen fill barrels with tallow, pitch, and dried wood; these they set on fire, and roll down on our works. At the same time, they fight most furiously, to deter the Romans, by the engagement and danger, from extinguishing the flames. Instantly a great blaze arose in the works. For whatever they threw down the precipice, striking against the vine and agger, communicated the fire to whatever was in the way. Our soldiers on the other hand, though they were engaged in a perilous sort of encounter, and labouring under the disadvantages of position, yet supported all with very great presence of mind. For the action happened in an elevated situation, and in sight of our army; and a great shout was raised on both sides; therefore every man faced the weapons of the enemy and the flames in as conspicuous a manner as he could, that his valour might be the better known and attested. XLIII.--Caesar, observing that several of his men were wounded, ordered the cohorts to ascend the mountain on all sides, and, under pretence of assailing the walls, to raise a shout: at which the besieged being frightened, and not knowing what was going on in other places, call off their armed troops from attacking our works, and dispose them on the walls. Thus our men, without hazarding a battle, gained time partly to extinguish the works which had caught fire, and partly to cut off the communication. As the townsmen still continued to make an obstinate resistance, and even, after losing the greatest part of their forces by drought, persevered in their resolution: At last the veins of the spring were cut across by our mines, and turned from their course. By this their constant spring was suddenly dried up, which reduced them to such despair that they imagined that it was not done by the art of man, but the will of the gods; forced, therefore, by necessity, they at length submitted.